Automatic gate opening or closing apparatus for elevators.



No. 648,104. Patented Apr. 24, |900.

.1. E. w. roGAL. AUTUMATIC GATE OPENING 0R CLOSING APPARATUS FOR ELEVATORS.

(Application led Jan. 16, 1900.) (No Model.)

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AUTOMATIC GATE OPENING OR CLOSING APPARATUS POR LEvATORs';

SPECIFICATION forming part of Letters Patent N o. 648,104, dated April 24, 1900.

Application filed January 16, 1900. Serial No. 1,623. (No model.)

Vzen ofthe United States, residing at Quincy,

in the county of Adams and State of Illinois, have invented a new and useful Automatic Gate Opening or Closing Apparatus for Ele vators, of which the following is a specification.

My invention is an improved automatic gate opening and closing apparatus for elevators, one object of my invention being to provide an elevator car' and gate with improved devices for automatically opening and closing the gate as the car approaches and recedes therefrom in ascending and descend ing. l

A further object of my invention is to provide an improved gate opening and kclosing lever fulcrumed at a fixed point and having engaging tappets at opposite ends anda novel form of cam carried by the car and having two engaging faces, one for each lever-tappet, whether the car be ascending or descending, so disposed as to avoid necessity for adjustment of the lever and to render the latter operable by the cam under all conditions, and hence avoidaccidental jamming .of the lever and cam and attendant disastrous consequences.

To these ends my inventionconsists in the peculiar construction and combination of devices hereinafter fully set forth, and particularly pointed out in the claim.

In the accompanying drawings, Figure lis a perspective view of an automaticggate opening and closing apparatus for elevators embodying my improvements, showing my improved cam and lever in operable position With relation to each other. Fig. 2 is a side elevation of the same, illustrating the lever in another position.

The vertical elevator guide frame or well l and the elevator car or platform 2 may be of any suitable form orvconstruction. The gate 3 is of the vertically-movable type, is mo'untl ed and adapted to move in vertical guides 4t, and is adapted for closing the entrance to the well or hatchway after the car has passed the level of the door on which the gate is located.

Rigidly secured to the car on one side thereof and carried-thereby is an inclined cam-bar 5, which is obliquely disposed, as here shown, and is of right-angular form in cross-section.l The opposite sides of the-inclined cam-bar constitute engaging faces a b. y

A lever 6 is ulcrumed at one side of the guide frame or well, as at 7, and is disposed in the path of the cam-bar as the latter ascends and descends with the elevator car or platform. HoriZontally-disposed guidesA 8 bear against the outer side of the lever, near the ends thereof, and angled yokes 9 may, as here shown, be bolted to the outer side of the said lever and caused to engage said horizontal guides. The employment of said guides and yokes is optional and is not-imperative, the only function of said guides and yokes being to counteract any tendency of the lever to tilt on its pivot. Astop-bracket 12 limits the' stroke of the lever. Near the upper end of the lever is a tappet b, which, as here shown and preferably, is an antifrictions roller which is adapted to engage and operate on the face b of the cam-bar. At the lower end of the lever is a tappet a', which, as here shown and preferably, is an antifriction-roller adapted to engage and operate on the face a of the cam-bar. The upper end of the lever is connected to the gate 3 by a rope or chain 10, which is guided lon 'suitably disposed sheaves ll, and the said gate is thereby rendered operable by the said lever, kas will be readily understood, the said lever raising the gate when it is moved in one direction and permitting the gate to descend when it is moved inthe vopposite direction.

When the elevator approaches the gate in ascending or descending, one of the tappets vof the lever will engage one of the faces of the inclined cam-bar, and thereby turn the lever on its pivot as the cam-bar moves on said tappet, the leverand connecting devices hereinbefore described serving to elevate the gate, and thereby permit accessto the car or egress therefrom. The said tappet of the said lever will remain in engagement with the said engaging face of the said cam-bar throughout the entire movement of the lever as the said cam passes the said tappet, and as the car continues to 1nove, whether ascending or descending, the other tappet on the lever will become engaged by the opposite face of the IOO cam, thereby returning the lever to its original position and lowering or closing the gate as the car recede-s from the oor on which the gate is located.

[twill be understood from the foregoing and by reference to the drawings that the lever requires practically no adjustment, Will be positively operated by the cam bar no matter what maybe the relative positions of the cambarandlever Within the limit of movement of the latter, that the t-appets or ends of the lever cannot become jammed with the cam, and hence all danger which might result from an imperfect adjustment of lthe operating parts 'is avoided.

Having thus described myinvcntion, what is claimed is The combination with an inclined cam-bar In testimony that I claim the foregoing asmy own Iliave hereto axed my signature in the presence of two Witnesses.

JOHN E. W. FOGAL.

Witnesses:

Guo. M. JANEs, H. L. SIMPSON. 

